Straightway valve.



- (Appliution 211 Feb 91, 18

(In Modem VENTOR.

WITNESSES.

WJM

.dttorneys UNITED STATES" P TENT GFFICE.

HENRY A. MOGRORY, OF DETROIT, MICHIGAN.

'STRAIGHTWAY valve. i

ammonia: formingpart or Letters" Pat nt no. 629,086, dated m 18, 1899.Application filed February 21, 1893- Seiidl No; 670,996. (No model) orings, and to the letters of reference, marked thereon ,which form a partof this specification.

This invention relatesto straightway plugvalves; and it consists in theconstruction and arrangement of parts ,hereinafter fully set forth, andpointed out particularly in the claims. 1

The objects of the invention are to produce a quick-openin g straightwayplug-valve in which the arrangements are such as to provide for quicklyraising the valve from its seat before being turned in the operation ofopening and closing the valve to obviate the cutting of the valve in itsseat; to provide for accelerating the vertical movement of the valye, sothat it may be seated or withdrawn from its seat with but acomparatively slight movement of the operating hand-wheel; to providefor arresting the valve, so as to bring the opening therethroughintotrue alinement with the ports of the valve-case when open and toproperly cover said ports with the solid side of the valve when closed;to provide a valve-seat comprising a narrow raised surface only aroundthe port-openings either upon the valve orthe valve-case, so as to leavethe greater portion of the surface of the valve free from the wall ofthe case, obviating the accumulation of dirt upon the valve-seat, so asto preventthe properseating ofthe valve, and to provide for eifectingaclosure around the valve-stem when the valve is raised independent ofthe stufing-box. These objects are attained by'the mechanism illustratedin the accompanying drawings, in which- Figure 1 is an elevation of myimproved valve construction. Fig. 2 is a vertical central sectiontherethrough. Fig. 3 is a vertical and horizontal section as on line'3 3of Fig. 1. Fig. 4 is a transverse section through the valve-case,showing the plug-valve removed. I I I I Referring to the letters ofreference, Adesi gnates the valve-case,which is a hollow globular bodyprovided .with the opposed ports B. Aroundthe inner opening of theseports is a raised surface a, which comprises the valveseat and conformsto the contourof the valve. These raised surfaces at around the ports inthe valve-case stand away from the inner wall oi the case, so that theplug-valve O has bearing upon said raised surfaces only, the body of thevalve being free from the walls of the case, forming an open space 17between the case and valve on the sides, as clearly shown in Fig. 3,which space I) communicates with the recess b in the base of thevalve-case below the bottom ofthe valve.

The valve 0 comprises a tapering hollow shell having a solid top andbottom and provided with the openings d'through the opposedsidesthereof, which are adapted when the valve isopen to register with theports B in the valve case.

The valve 0 is provided with an integral stem D,which passes upwardthrough the cap Eof the valve-case and carries at its upper end across-arm F, through the medium of which said stem may be turned tooperate the valve.

The cap E of the valve-case is provided with a vertical stem G, throughwhich the valve-stempasses and which throughout its length is externallyscrew-threaded. Upon the upper end of said stem G is the cap H of thestoning-box, through-which the valvestem also passes and which confinesa suitable packing 0 around said valve-stem.

The upper end of the valve-stem D below the cross-arm F is provided witha left-hand screw-thread 2, whereby the upper end of said stem isadapted to screw through the tappethub f of the hand-wheel I,accomplishing the attachment of said hand-wheel to said valve-stem, butrendering said wheel rotarily movable thereon. Depending from saidhandwheel are the curvedarms J, which are united at their lower ends toa cross-piece or enlarged boss K, which is provided with a centraltapped aperture, whereby said boss is adapt-' ed to screw over theright-hand screw-threads g of the stem G of the cap E, forming of saidarms a yoke which is screw-threaded to said stem G and adapted to turnthereon.

By reason of the fact that the yoke of the ban d-wheel engages a right-h and sore w-thread on the cap-stem G and the hub of the handwheel Iengages a left-hand thread on the valvestem a rotation of said hand-wheel in either direction will cause said threaded parts to act inunison to raise or lower the valve, thereby requiring but acomparatively slight movement of the hand-wheel to raise the valve fromits seat or to again seat the valve after a movement thereof.

It will now be understood that when the valve is closed and it isdesired to seat the plug to make the-closu re tight thehand-wheel I isturned to the right to screw its yoke downward upon the stem of the cap,whereby a downward draft is exerted upon the valve stem through theengagement of a hand-wheel therewith. At the same time the turning ofsaid hand-wheel to the right will cause said stem to screw downwardtherethrough because of the left-hand thread thereon, whereby thedownward movement which is imparted to the valve by a given rotationwith the hand-Wheel is multiplied by two, requiring but a slightmovement of said wheel to firmly seat the valve.

To raise the plug from its seat before opening the valve, the hand-wheelis turned to the left, whereby the yoke is screwed upward upon the stemof the cap and the valve-stem is screwed upward through the hub of thehand-wheel, multiplying by two the upward movement of the valve for agiven turn of said wheel. As it requires but a slight movementvertically of thevalve to seat it or free it from its seat a fraction ofa turn of the hand-wheel in either direction with the arrangement shownwill be sufficient to release or seat the valve, reducing the timerequired for its operation to the minimum. Upon the release of theplug-valve from its seat it is turned by means of the cross-arm F tocause the apertures d to register with the ports B of the valve-case,when it may be seated to retain it in said position. In closing thevalve it is turned by means of said cross-arm until its solid sidesstand over the ports B of the case, as shown in Fig. 2, when it is againseated to make the closure tight. The arrangement is such that aboutone-half of a turn of the hand-wheel is sufficient in opening the valveto raise said valve from its seat, when one-quarter of a turn of thecross-arm F will swing the openings in the valve so as to register withthe ports in the valve-case, thus enabling the valve to be opened to itsfull area with less that what would be the equivalent of one turn of thehand-wheel of the ordinary globe-valve.

By reason of the fact that the valve is raised from its seat before itis turned no cutting of the valve in its seat is possible, as said valvein moving in its rotation is perfectly free from the valve-seat, therebyobviating any wear on the parts.

XV hen the valve shall have been raised sufficiently high to free itselffrom its seat, the beveled shoulder h at the base of the valve stem iscaused to engage a seat 7 formed in the depending boss L of the capwhich surrounds the valve-stem, thereby effecting a closure around saidstem when the valve is open, permitting the stem to be packed at 0without the escape of steam or other fluid.

To provide for arresting the plug-valve C in its rotation, so as tobring the aperture (1 therethrough into proper alinement with the portsof the valve-case when open and to cause the solid sides of said valveto properly cover'the inner openings of said ports when the valve isclosed, suitable stop-pins o are seated in the bottom of the valve-case,be tween which a third pin 0, depending from the bottom of the valve, isadapted to reciprocate, the location of said stop-pins being such thatthe valve is properly limited in its rotary movement in both directions,as will be well understood, thus providing simple and efficient meansfor arresting said valve at the proper point inits reciprocation.

By providing a raised valve-seat at around the inner opening of theports of the valvecase a valve-seat is produced which embraces but asmall area of the surface of the valve, obviating the possibility of anaccumulation of dirt interfering with'the propel-seating of the valveand causing any dirt which might be present upon the valve-seat to beswept therefrom into the spaces b on either side by the rotary movementof the valve.

Vhile I have shown the raised seats a as surrounding the aperture of theports of the valve-case, it is evident that said raised seats may beplaced upon the exterior of the valve around the openings therethroughand accomplish the same result without departing from the spirit of myinvention.

Having thus fully set forth my invention, what I claim as new,'anddesire to secure by Letters Patent, is-

1. In a straightway valve, the combination of the valve-case having astraight way therethrough, a plug-valve seated in said case, thevalve-stem integral with the valve carrying a cross-arm at its upperend, a hand-wheel attached to said valve-stem and adapted to turnthereon, a fixed member mounted centrally on the valve-case andexternally threaded, and a swinging yoke comprising the arms J andconnecting-boss K depending from said hand-wheel and screwing onto saidfixed threaded member of the valve-case.

2. In a straightway valve, the combination of the valve-case, theplug-valve seated therein, the cap of said valve-case having anexternally-threaded stem, the stem of the valve passing through saidstem of the cap and adapted to rotate and move vertically therein, theupper end of the valve-stem havinga left hand thread, the hand-wheelscrewing onto said left-hand thread, the swinging yoke cornprising thearms, J and connecting-boss K depending from said hand-wheel andscrewing onto the external thread of the cap-stem, and means forrotating the valve-stem. g

3. The combination of the valve-case, the

7 Valve therein,-the valve-stem passing through the case and having aleft-hand screw-thread on its upper end, a stem projecting from thevalve-case having a right-hand thread, the hand wheel 1 screwing ontothe left hand threads of the valve-stem, a swinging yoke comprising thearms J and connecting-boss K depending fromsaid hand-wheel and eneaos V3 adapted to nioye yerticaHy, the Valve-stem integral with the valve,carrying an external thread at its upper end, a hand-wheel screwed ontothe threads at the upper end of the valvestem, afixed annular membermounted centrally on the valve-case, a yoke depending from thehand-Wheel comprising the opposed arms and connecting boss, theconnectingboss of said yoke being attached to and adapted to turn uponthe fixed annular member of the valve-case. I,

In testimony whereof I sign this specification in the presence at twoWitnesses.

HENRY A. MOGRORY. Witnesses E. 0. WHEELER, 1

SJ WHEELER.

